人烟稀少 Sparsely populated

非火源区的烟气稀释 Dilution

村庄人烟稀少 Sparsely populated villages ; Villages in sparsely

人烟稀少的早晨 Sparsely populated in the morning ; sparsely-populated morning ; Sparsely morning

附近村庄人烟稀少 Nearby villages deserted ; sparsely populated villages near

烟囱稀释因子 stack dilution factor

人烟稀少地带 thinly populated area

虽然这里人烟稀少 Though our numbers are few

稀有金属烟花药剂 rare metal firework powder